Relay drainage system of tunnel

Abstract

The utility model discloses a relay drainage system of a tunnel, which comprises a plurality of sections of fixedly connected composite lining structures lined on the inner wall of the tunnel and used for draining sudden gushing water during reverse slope tunneling of the tunnel, the water collecting well is arranged below one radial end of each section of the composite lining structure, is fixedly connected with the composite lining structure and is used for discharging sudden gushing water; each section of composite lining structure comprises a plurality of side arch steel pipe pieces which are fixedly connected with the water collecting wells and are used for excavating the water collecting wells, and a plurality of first side arch concrete pipe pieces which are arranged at the two axial ends of the side arch steel pipe pieces, are fixedly connected with the side arch steel pipe pieces and are used for supporting a tunnel; the side arch steel pipe pieces are of hollow structures, the adjacent side arch steel pipe pieces are fixedly connected, and the adjacent water collecting wells are connected through steel pipes arranged in the side arch steel pipe pieces in a penetrating mode. According to the technical scheme, the tunnel segment lining structure is simplified, the installation steps of the drainage system are simplified, and the drainage efficiency of sudden gushing water is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction by shield machines, and in particular relates to a relay drainage system for a tunnel. Background Art

[0002] At present, the shield method is usually used to construct tunnels. For example, a double-shield TBM (Tunnel Boring Machine, hereinafter referred to as shield machine) can tunnel upslope (i.e. downhill) in the stratum while lining the segments. The segments can bear the surrounding rock pressure and external water pressure, ensuring the stability of the tunnel.

[0003] When a shield machine is used to construct a tunnel, the front and top of the shield machine's cutterhead are prone to water inrush (water that suddenly rushes out of the surrounding rock). If the water inrush cannot be pumped out of the tunnel in time, it will flood and damage the shield machine, terminating the tunnel excavation work.

[0004] In the prior art, "A Shield Water Conveyance Tunnel Composite Lining Structure and Construction Method Thereof" with application number 201911285705.1 discloses a water conveyance tunnel lining structure, which includes an inner steel pipe, an outer concrete pipe segment, a water conveyance flower pipe wound between the inner and outer layers, and a longitudinal drainage pipe at the bottom of the water conveyance flower pipe. The water conveyance flower pipe and the longitudinal drainage pipe constitute a drainage system that can discharge water that has penetrated between the outer lining (i.e., concrete pipe segment) and the inner lining (i.e., solid steel pipe segment) of the water conveyance tunnel.

[0005] However, on the one hand, the existing water tunnel segment lining structure is complex, requiring the concrete segment outer lining first and the solid steel segment inner lining later. On the other hand, the existing drainage system installation steps are complex, specifically including the following steps: first, lining the water tunnel with concrete segments; second, installing longitudinal drainage pipes under the segments; third, installing drainage flower pipes on the outer surface of the steel lining; fourth, welding the steel lining with multiple sections of drainage flower pipes installed on the outer surface (i.e., inner lining) to the inner side of the concrete segment.

[0006] Therefore, there is an urgent need for a tunnel drainage system with a simple tunnel segment lining structure and simple drainage system installation steps. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a relay drainage system for a tunnel, which simplifies the tunnel segment lining structure and the installation steps of the drainage system, and greatly improves the drainage efficiency of sudden water.

[0008] The technical solution adopted by the utility model is: a relay drainage system for a tunnel, characterized in that it includes a multi-section fixedly connected composite lining structure lined on the inner wall of the tunnel for discharging sudden water encountered when the tunnel is excavated against the slope, and a water collection well for discharging sudden water encountered, which is arranged below one radial end of each section of the composite lining structure and is fixedly connected to the composite lining structure; each section of the composite lining structure includes a plurality of side arch steel pipe segments fixedly connected to the water collection well for excavating the water collection well, and a plurality of first side arch concrete pipe segments fixedly connected to the side arch steel pipe segments at both axial ends of the side arch steel pipe segments for supporting the tunnel; the side arch steel pipe segments are hollow structures, adjacent side arch steel pipe segments are fixedly connected, and adjacent water collection wells are connected by steel pipes penetrated in the side arch steel pipe segments.

[0009] The above-mentioned relay drainage system for a tunnel is characterized in that: each section of the composite lining structure also includes one or more bottom arch steel segments arranged at the bottom of the tunnel and fixedly connected to the side arch steel segments for recovering the sudden water flowing back along the tunnel excavation direction to the collection well, and a plurality of bottom arch concrete segments arranged at both axial ends of the bottom arch steel segments and fixedly connected to the bottom arch steel segments for lining the tunnel; the bottom arch concrete segments and the side arch steel segments and the first side arch concrete segments are all fixedly connected; the bottom arch steel segments are hollow structures, and adjacent bottom arch steel segments are fixedly connected, and adjacent bottom arch concrete segments are fixedly connected.

[0010] The above-mentioned relay drainage system for a tunnel is characterized in that each section of the composite lining structure also includes a second side arch concrete segment for supporting the tunnel, which is radially symmetrical with the side arch steel segment and fixedly connected to the bottom arch steel segment and the bottom arch concrete segment, and adjacent second side arch concrete segments are fixedly connected.

[0011] The above-mentioned relay drainage system for a tunnel is characterized in that each section of the composite lining structure also includes a top arch concrete segment for supporting the tunnel, which is radially symmetrical with the bottom arch steel segment and the bottom arch concrete segment and is fixedly connected to the second side arch concrete segment, the side arch steel segment and the first side arch concrete segment, and adjacent top arch concrete segments are fixedly connected.

[0012] The above-mentioned relay drainage system of a tunnel is characterized in that each of the side arch steel pipe segments and each of the bottom arch steel pipe segments includes two long pipe segments and four short pipe segments; two pairs of short pipe segments are symmetrically arranged at both ends of the two long pipe segments, the long pipe segments and the short pipe segments are fixedly connected, and the short pipe segments are fixedly connected to each other.

[0013] The above-mentioned relay drainage system for a tunnel is characterized in that each of the short segments includes an I-shaped segment frame and an I-shaped segment spherical surface connected to the I-shaped segment frame; the I-shaped segment spherical surface includes an outer convex curved surface or an inner concave curved surface.

[0014] The beneficial effects are inferred as follows:

[0015] In the prior art, the tunnel must be lined first and then the drainage system must be installed, and the lining structure is complex and the drainage system installation steps are cumbersome.

[0016] The utility model provides a tunnel relay drainage system, in which, firstly, a composite lining structure of the tunnel is installed while the tunnel is being excavated, specifically, hollow structure steel segments and solid concrete segments are alternately lined, thereby simplifying the tunnel segment lining structure and avoiding the complicated lining structure caused by first uniformly lining the outer layer of concrete segments and then uniformly lining the inner layer of solid steel segments in the prior art.

[0017] Secondly, by directly digging a collection well on the inner wall of the tunnel through the hollow side arch steel pipe segments, the structure of the drainage system is simplified, avoiding the cumbersome installation steps of the drainage system caused by laying drainage flower pipes between the outer concrete pipe segments and the inner steel pipe segments and laying drainage pipes under the drainage flower pipes in the prior art.

[0018] It is also because the tunnel segment lining structure and drainage system installation steps have been simplified that the drainage efficiency of sudden water surges has been greatly improved. For example, when encountering sudden water surges ahead of excavation, the segments can be quickly lined and the drainage system can be laid out to achieve rapid drainage of sudden water surges.

[0019] Therefore, the relay drainage system of the tunnel in the utility model simplifies the lining structure of the tunnel segments and the installation steps of the drainage system, thereby greatly improving the drainage efficiency of sudden water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a composite lining structure and a water collection well provided by the utility model;

[0021] Figure 2 for Figure 1 The plane development diagram of the composite lining structure in the middle section;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure of a steel pipe segment;

[0023] Figure 4 for Figure 3 Two structural schematic diagrams of a short pipe segment in the middle.

[0024] Description of reference numerals:

[0025] Side arch steel segment 1; first side arch concrete segment 2; bottom arch steel segment 3;

[0026] Bottom arch concrete segment 4; second side arch concrete segment 5; top arch concrete segment 6;

[0027] Long tube segment 7; short tube segment 8; I-shaped tube segment frame 9; outer convex curved surface 101; inner concave curved surface 102;

[0028] Water collection well 11. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the embodiments and drawings. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0030] It should be noted that, in the absence of conflict, the features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments and drawings.

[0031] In the prior art, the segment lining structure of the tunnel drainage system is complex and the installation steps of the drainage system are cumbersome.

[0032] Based on this, the utility model provides a relay drainage system for a tunnel, which simplifies the tunnel segment lining structure and the installation steps of the drainage system, thereby greatly improving the drainage efficiency of sudden water surges.

[0033] Figure 1 A schematic diagram of a composite lining structure and a water collection well provided by the utility model. Figure 2 for Figure 1 The plane development diagram of the composite lining structure in the middle section, Figure 3 for Figure 2 The structural diagram of a steel pipe segment. Figure 4 for Figure 3 Two structural schematic diagrams of a short pipe segment in the middle.

[0034] Combination Figure 1 and Figure 2The utility model provides a relay drainage system for a tunnel, comprising a multi-section fixedly connected composite lining structure lined on the inner wall of the tunnel for discharging sudden water encountered when digging the tunnel against the slope, and a water collection well 11 for discharging sudden water encountered, which is arranged below one radial end of each section of the composite lining structure and fixedly connected to the composite lining structure; each section of the composite lining structure comprises a plurality of side arch steel pipe segments 1 fixedly connected to the water collection well 11 for excavating the water collection well 11, and a plurality of first side arch concrete pipe segments 2 arranged at both axial ends of the side arch steel pipe segments 1 and fixedly connected to the side arch steel pipe segments 1 for supporting the tunnel; the side arch steel pipe segments 1 are hollow structures, adjacent side arch steel pipe segments 1 are fixedly connected, and adjacent water collection wells 11 are connected by steel pipes penetrated in the side arch steel pipe segments 1.

[0035] First, the title "A relay drainage system for a tunnel" is explained. The use scenario of the relay drainage system in the utility model is to use a shield machine (for example, a double shield TBM) to dig in the stratum along the reverse slope (i.e. downhill) direction. The double shield TBM can line (i.e. install or lay) pipe segments (for example, a combination of lining hollow steel pipe segments and solid concrete pipe segments) on the tunnel wall while digging the tunnel against the slope. It can be understood that the relay drainage system for a tunnel in the utility model can be used in the excavation process of various tunnels. For example, water supply tunnels, subway tunnels, etc.

[0036] Furthermore, a pit (i.e., a water collection well 11) with a certain depth can be excavated downward on the tunnel wall by artificially using hollowed-out steel pipe segments. The above process is a section of the composite lining structure of the tunnel.

[0037] By analogy, when the tunnel is lined with a multi-section composite lining structure and the corresponding water collection well 11 is excavated, the installation of the tunnel relay drainage system is completed.

[0038] The side arch steel pipe segment 1 is used to dig a water collection well 11 below one side wall of the tunnel, and the first side arch concrete pipe segment 2 is used to line the tunnel.

[0039] It should be noted that the axial direction is the direction of tunnel excavation.

[0040] The side arch steel segment 1 and the first side arch concrete segment 2 are fixedly connected. For example, the fixed connection method may be expansion bolt connection. For example, the specification of the expansion bolt may be M20*100.

[0041] Adjacent side arch steel pipe segments 1 are fixedly connected. Exemplarily, the fixed connection method may be welding connection.

[0042] In a specific implementation, while the shield machine is excavating the tunnel in the reverse slope, the side arch segments (for example, the side arch steel segment 1 and the first side arch concrete segment 2) can be alternately lined at the same time, thereby completing the lining of a section of the composite segment of the tunnel. Furthermore, a water collection well 11 is manually excavated under one side arm of the tunnel through the side arch steel segment 1, thereby completing the excavation of a water collection well 11 corresponding to a section of the composite segment lining structure. By analogy, the lining of multiple sections of the composite segment of the tunnel is completed. Finally, the relay pumping of the sudden water is completed by connecting the steel pipes between adjacent water collection wells 11.

[0043] The beneficial effects are inferred as follows:

[0044] In the prior art, the tunnel must be lined first and then the drainage system must be installed, and the lining structure is complex and the drainage system installation steps are cumbersome.

[0045] The utility model provides a tunnel relay drainage system, in which, firstly, a composite lining structure of the tunnel is installed while the tunnel is being excavated, specifically, hollow structure steel segments and solid concrete segments are alternately lined, which simplifies the tunnel segment lining steps and avoids the complicated lining structure caused by first uniformly lining the outer layer of concrete segments and then uniformly lining the inner layer of solid steel segments in the prior art.

[0046] Secondly, by directly digging a collection well on the inner wall of the tunnel through steel pipe segments, the structure of the drainage system is simplified, avoiding the cumbersome installation steps of the drainage system caused by laying drainage flower pipes between the outer concrete pipe segments and the inner steel pipe segments and laying drainage pipes under the drainage flower pipes in the prior art.

[0047] It is also because the tunnel segment lining structure and drainage system installation steps have been simplified that the drainage efficiency of sudden water surges has been greatly improved. For example, when encountering sudden water surges ahead of excavation, the segments can be quickly lined and the drainage system can be laid out to achieve rapid drainage of sudden water surges.

[0048] Therefore, the relay drainage system of the tunnel in the utility model simplifies the lining structure of the tunnel segments and the installation steps of the drainage system, thereby greatly improving the drainage efficiency of sudden water.

[0049] In the above-mentioned embodiment, each section of the composite lining structure includes a side arch steel segment 1 and a first side arch concrete segment 2. In another embodiment of the present invention, each section of the composite lining structure also includes a bottom arch steel segment 3 and a bottom arch concrete segment 4.

[0050] Continue to see Figure 1 and Figure 2Each section of the composite lining structure also includes one or more bottom arch steel segments 3 arranged at the bottom of the tunnel and fixedly connected to the side arch steel segments 1 for recovering the sudden water flowing back along the tunnel excavation direction to the collection well 11, and a plurality of bottom arch concrete segments 4 arranged at both axial ends of the bottom arch steel segments 3 and fixedly connected to the bottom arch steel segments 3 for lining the tunnel; the bottom arch concrete segments 4 and the side arch steel segments 1 and the first side arch concrete segments 2 are all fixedly connected; the bottom arch steel segments 3 are hollow structures, and adjacent bottom arch steel segments 3 are fixedly connected, and adjacent bottom arch concrete segments 4 are fixedly connected.

[0051] Among them, the bottom arch steel pipe segment 3 is used to collect the sudden water flowing back along the tunnel excavation direction into the collection well 11. When the shield machine excavates the reverse slope (i.e. downhill), the water flow (e.g., sudden water flow) encountered in front is lifted in the direction opposite to the excavation direction. Since the lift of the shield machine is limited (e.g., 1 km), if the water flow cannot be lifted to the outside of the tunnel, it will flow in the reverse slope direction (i.e., the excavation direction) (i.e., backflow). In order to avoid the risks brought by backflow (e.g., flooding the shield machine), one or more segments of the bottom arch segments can be set as steel segments with a hollow structure, and the remaining bottom arch segments can be set as concrete segments.

[0052] It is understandable that the wellhead height of the water collection well 11 must be lower than the height of the bottom arch steel pipe segment so that the return water can flow into the water collection well 11 .

[0053] In the above-mentioned embodiment, each section of the composite lining structure includes a bottom arch steel segment 3 and a bottom arch concrete segment 4. In another embodiment of the present invention, each section of the composite lining structure also includes a second side arch concrete segment 5.

[0054] Continue to see Figure 1 and Figure 2 Each section of the composite lining structure also includes a second side arch concrete segment 5 for supporting the tunnel, which is radially symmetrical with the side arch steel segment 1 and fixedly connected to the bottom arch steel segment 3 and the bottom arch concrete segment 4. Adjacent second side arch concrete segments 5 are fixedly connected.

[0055] Among them, “the second concrete segment 5 radially symmetrical to the side arch steel segment 1” can be understood as the second side arch concrete segment 5 and the first side arch steel segment 1 being lined on the tunnel wall in a left-right symmetrical manner.

[0056] In a specific implementation, while the bottom arch steel segments 3 and the bottom arch concrete segments 4 are alternately lined, the second side arch concrete segments 5 can be lined.

[0057] In the above-mentioned embodiment, it is introduced that each section of the composite lining structure further includes a second side arch concrete segment 5. In another embodiment of the present utility model, it is introduced that each section of the composite lining structure further includes a top arch concrete segment 6.

[0058] Continue to see Figure 1 and Figure 2 Each section of the composite lining structure also includes a top arch concrete segment 6 for supporting the tunnel, which is radially symmetrical with the bottom arch steel segment 3 and the bottom arch concrete segment 4 and fixedly connected to the second side arch concrete segment 5, and adjacent top arch concrete segments 6 are fixedly connected.

[0059] Among them, “the top arch concrete segment 6 which is radially symmetrical with the bottom arch segment (including the bottom arch steel segment 3 and the bottom arch concrete segment 4)” can be understood as the top arch concrete segment 6 and the bottom arch segment being symmetrically lined on the tunnel wall from top to bottom.

[0060] In a specific implementation, the top arch concrete segment 6 can be lined while the second side arch concrete segment 5 is being lined.

[0061] In the above-mentioned embodiment, each section of the composite lining structure further includes a top arch concrete segment 6. In another embodiment of the present invention, the specific structure of each steel segment (eg, side arch steel segment 1 or bottom arch steel segment 3) is introduced.

[0062] Figure 3 for Figure 2 Schematic diagram of the structure of a steel pipe segment.

[0063] See also Figure 3 Each side arch steel pipe segment 1 and each bottom arch steel pipe segment 3 includes two long pipe segments 7 and four short pipe segments 8; two pairs of short pipe segments 8 are symmetrically arranged at both ends of the two long pipe segments 7, and the long pipe segments 7 and the short pipe segments 8 are fixedly connected, and the short pipe segments 8 are fixedly connected to each other.

[0064] In the above-mentioned embodiment, the specific structure of each steel pipe segment is introduced. In another embodiment of the utility model, the specific structure of each short pipe segment is introduced.

[0065] Figure 4 for Figure 3 Two structural schematic diagrams of a short pipe segment in the middle.

[0066] See also Figure 4 Each short segment 8 includes an I-shaped segment frame 9 and an I-shaped segment spherical surface connected to the I-shaped segment frame 9; the I-shaped segment spherical surface includes an outer convex curved surface 101 or an inner concave curved surface 102.

[0067] The design structure of the convex curved surface 101 or the concave curved surface 102 can facilitate the connection between steel pipe segments (for example, the side arch steel pipe segment 1 and the bottom arch steel pipe segment 3).

[0068] Specifically, the spherical surfaces of the two short segments 8 adjacent to each other at the same end of the two long side segments 7 are both convex surfaces 101, or are both concave surfaces 102, or are a combination of a convex surface 101 and a concave surface 102. Such a design structure is conducive to the connection between the arch steel segments.

[0069] Exemplarily, the model of the I-shaped segment frame 9 may be I25#b, and the thickness of the spherical surface of the I-shaped segment may be 10 mm.

[0070] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tunnel relay drainage system, characterized in that: It comprises a composite lining structure with multiple sections fixedly connected and lined on the inner wall of the tunnel for discharging sudden water gushing encountered when the tunnel is excavated against the slope, and a water collection well (11) arranged below one radial end of each section of the composite lining structure and fixedly connected to the composite lining structure for discharging sudden water gushing encountered; Each section of the composite lining structure comprises a plurality of side arch steel segments (1) fixedly connected to the water collection well (11) and used for excavating the water collection well (11), and a plurality of first side arch concrete segments (2) arranged at both axial ends of the side arch steel segments (1) and fixedly connected to the side arch steel segments (1) and used for supporting the tunnel; The side arch steel pipe segments (1) are of a hollow structure, adjacent side arch steel pipe segments (1) are fixedly connected, and adjacent water collection wells (11) are connected via steel pipes inserted through the side arch steel pipe segments (1).

2. A tunnel relay drainage system according to claim 1, characterized in that: Each section of the composite lining structure further comprises one or more bottom arch steel segments (3) arranged at the bottom of the tunnel and fixedly connected to the side arch steel segments (1) for recovering the sudden water flowing back along the tunnel excavation direction to the water collection well (11), and a plurality of bottom arch concrete segments (4) arranged at both axial ends of the bottom arch steel segments (3) and fixedly connected to the bottom arch steel segments (3) for lining the tunnel; The bottom arch concrete segment (4), the side arch steel segment (1), and the first side arch concrete segment (2) are all fixedly connected; The bottom arch steel pipe segments (3) are of a hollow structure, adjacent bottom arch steel pipe segments (3) are fixedly connected, and adjacent bottom arch concrete pipe segments (4) are fixedly connected.

3. A tunnel relay drainage system according to claim 2, characterized in that: Each section of the composite lining structure further comprises a second side arch concrete segment (5) for supporting the tunnel, which is radially symmetrical with the side arch steel segment (1) and fixedly connected to both the bottom arch steel segment (3) and the bottom arch concrete segment (4); adjacent second side arch concrete segments (5) are fixedly connected to each other.

4. A tunnel relay drainage system according to claim 3, characterized in that: Each section of the composite lining structure further comprises a top arch concrete segment (6) for supporting the tunnel, which is radially symmetrical with the bottom arch steel segment (3) and the bottom arch concrete segment (4) and is fixedly connected to the second side arch concrete segment (5), the side arch steel segment (1) and the first side arch concrete segment (2), and adjacent top arch concrete segments (6) are fixedly connected to each other.

5. A tunnel relay drainage system according to claim 2, characterized in that: Each of the side arch steel segments (1) and each of the bottom arch steel segments (3) comprises two long segments (7) and four short segments (8); Two pairs of short tube segments (8) are symmetrically arranged at both ends of the two long tube segments (7); the long tube segments (7) and the short tube segments (8) are fixedly connected, and the short tube segments (8) are fixedly connected to each other.

6. A tunnel relay drainage system according to claim 5, characterized in that: Each of the short segments (8) comprises an I-shaped segment frame (9) and an I-shaped segment spherical surface connected to the I-shaped segment frame (9); The spherical surface of the I-shaped pipe segment includes an outer convex curved surface (101) or an inner concave curved surface (102).

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